Jaw crusher faceplate



Aug. 17, 1965 I. c. KING 3,201,054

JAW CRUSHER FACEPLATE Filed May 9, 1963 INVENTOR.

BUCKHO/"W, BLOl-PE, KLA/POU/ST 8 SPAR/(MAN ATTORNEYS United States Patent 3,201,054 JAW CRUSH-1BR FACEhLATE Ivan C. King, 7027 W. Vermont Court, Fortland, Oreg. Filed May 9, 1963, Ser. No. 279,2 l 6 Claims. (Cl. 241291) This invention relates to an improved faceplate for a jaw crushen.

The patent of Baker 2,609,154 discloses a jaw crusher faceplate especially constructed so as to avoid the accumulation of bulging stresses, thus to prevent bulging of such plate.

I have noted that in the use of the faceplate shown in the Baker patent, the oblique grooves of the plate, which intersect to form depending apices, tend by virtue of such apices to channel material being crushed into the lower vertical grooves of the plate. This concentration of such material in the grooves during the crushing operation tends to wear down the edges of the vertical grooves to widen them. Since the fine crushing operation takes place at the lower portion of the faceplate, it is apparent that soon, some or all of the material being crushed is larger than expected and desired, because it is in part accommodated within the widened grooves.

It is a main object of the present invention to overcome the above problem, and more particularly to retain the anti-bulging feature of the vertical grooves of the Baker plate, but avoid the relatively rapid widening thereof which heretofore occurred.

A further object is to provide a faceplate as set forth in the preceding paragraph which is reversible and also which facilitates finer crushing operations than the Baker plate.

The present invention solves the above problem by locating the vertical grooves in offset relation to the lower apices formed by the oblique grooves so that the material being crushed is not channeled into the vertical grooves, whereby the vertical grooves are able to prevent the accumulation of bulging stresses in the lower margin of the crushed plate without being rapidly widened, as has heretofore occurred.

Various other objects of the invention will be apparent from the following description taken in connection with the accompanying drawings wherein:

FIG. 1 is a fragmentary vertical sectional view through a jaw crusher having faceplates of the present invention;

FIG. 2 is a perspective view of the left-hand faceplate of FIG. 1 taken generally from the front thereof;

FIG. 3 is an enlarged vertical section taken along line 33 of FIG. 2;

'FIG. 4 is a fragmentary horizontal section taken along line 4-4 of FIG. 3; and

FIG. 5 is an enlarged fragmentary section taken along line 55 of FIG. 2.

FIG. 1 shows a part of a jaw crusher which is conventional except for the 'faceplates thereof. The jaw crusher has a frame 11 having opposed base elements, one 13 being shown, and the other being located to the right of a pitman 15 journaled on the eccentric portion of a flywheel shaft 17. A flywheel 1% is mounted on one end of the shaft 17, the other end being driven by conventional means, not shown. A toggle plate 21 rockably engages the pitman 15 to determine the general operating position of the pitman. A tension mechanism, which includes a rod 23, holds the pitman 15 against the toggle plate 21.

The pitman 15 carries a faceplate 31 and a frame base member 13 carries a faceplate 33. Since faceplate 31 moves with the pitman 15, it will be referred to as the movable faceplate, whereas the faceplate 33 will be referred to as the fixed face plate since it is stationary with the frame base member 13. The pitman 15 has a Wedge ice surface 35 engaging a wedge surface 37 on the faceplate 31. A wedge strip 39 is secured by bolts 41 to the pitman and against opposed wedge surfaces 43 and 45 on the faceplate 31 and the pitman 15, respectively, to hold the faceplate 31 firmly against the wedge surface 35, and thus to firmly secure the faceplate to the pitman 15.

The fixed faceplate 33 has a pair of rear flanges 51 embracing the fame base member 13. The faceplate 33 also has a pair of lateral shoulders, one 53 being shown in FIG. 2. A pair of clamp plates (not shown) secure the shoulders to the frame base member 13.

It is apparent from FIGS. 1 and 3 that faceplate 33 has a slightly rounded crushing face, while the faceplate 31 has a fiat crushing face. Apart from this difference and the difierences in mounting, the configurations of the crushing faces of the faceplates are identical. Only the configuration of faceplate 33 need be explained. It might be pointed out here that while the overall surface configuration of the face of faceplate 33 is convex, it is still at least generally flattish. Since the overall surface configuration of the face of faceplate 31 is flat, itis also at least generally flattish.

Referring to FIG. 2-5, the faceplate 33 comprises a generally fiat rectangular plate-like body of manganese steel or other crusher jaw steel. The faceplate has a gently curving convex crushing face 61 and a flat rear face. Preferably, the rear face is formed with recesses or pockets 63 for the purpose of saving metal. Pairs of lifting eyes as are preferably provided at the upper and lower edges of the faceplate to enable the faceplate to be readily handled.

The central area of the crushing face d1 of the faceplate 33 is formed with a first series of parallel grooves 71 and a second series of parallel grooves 73 which extend obliquely to the direction of travel of the crushable material past the face 61. Thus the grooves '71 and 73 extend obliquely to the side and upper and lower edges of the faceplate. The grooves of each series are shown as being equally spaced, and the grooves 71 intersect the grooves 73 at abrupt angles to divide the major portion of the crushing face into a network of grooves and diamond-shaped crushing pads '75 isolated from each other by the grooves. It is apparent that there are three horizontal rows of crushing pads 75. On larger plates there would be more rows.

It can be seen from FIG. 2 that the network of grooves provides a lower horizontally extending composite sinuous or sawtooth groove 81 and a similar upper composite groove 83. Each composite groove is defined by alternating apical and indentational groove portions.

The grooves 71 and 73 and thus the composite grooves 81 and 83 terminate in spaced relation to the upper and lower edges of the faceplate 33 to leave a lower horizontal marginal portion 35 and a similar upper marginal portion 87.

Formed in the lower and upper marginal portions are a third series of parallel grooves 91 and a fourth series of parallel grooves d3, respectively. The grooves 91 and 93 are vertical and thus parallel to the direction of the fiow of crushable material past the crushing face of the faceplate.

The grooves 91 and 93 are equally laterally spaced and are olfset from the apical groove portions of the composite grooves 81 and 83. In fact, I have found that best operation occurs when the vertical. grooves are aligned with the indentational groove portions of the composite grooves 81 and S3. The lower vertical grooves 91 extend from the lower edge of the faceplate upwardly toward the composite groove 81 but terminate short of such groove. The grooves 93 have a similar relationship to the composite groove S6.

The vertical grooves preferably are about the same depth as the oblique grooves 71 and 73 but are narrower so that a finer crushing operation can take place at the lower margin of the faceplate 33.

The faceplate 33 is obviously reversible so that the upper margin 87 can be disposed lowermost. By being reversible, the life of the faceplate can be prolonged.

With a faceplate constructed as above described, the accumulation of bulging stresses is prevented in the marginal portions as well as the central areas of the faceplate, but the life of the faceplate has been substantially increased because the c-iushable material is diverted by the apical groove portions away from the lower vertical grooves.

It is also possible to construct a plate similar to the one in FIG. 2 but wherein the grooves 91 and 93 are not vertical but are obliquely arranged and could, as a matter of fact, form interrupted continuations of either grooves 71 or 73. A space would be povided between the upper ends of the narrow grooves and the lower ends of the larger grooves to avoid channeling. If desired, a second set of oblique grooves forming interrupted continuations of the other set of larger grooves could be provided and cross the first set of oblique grooves at a margin.

Having described the invention in what is considered to be the preferred embodiment thereof, it is desired that it be understood that the invention is not to be limited other than by the provisions of the following claims.

I claim:

l. A face plate for jaw crushers for crushing rocks and ore comprising a rigid, rectangular, plate-like body of manganese or similar steel having a forward crushing face to be mounted upright in a crushing mechanism with its back against a supporting surface on which it bears during crushing,

said crushing face being at least generally flattish,

said body having formed in the crushing face a first and second series of parallel grooves extending loblique'ly of the direction of travel of crushable maerial past said face,

the grooves being small in comparison to the areas between the grooves,

said areas between said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said grooves,

said pads serving to prevent lateral shift of material being crushed and tending to urge crushable material downwardly in such crush-ing mechanism While resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower edge of said face to leave at least a lower marginal portion free of said grooves,

said grooves at each margin forming a laterally extending generally sinuous or sawtooth shaped composite groove defining a series of apices alternating with indentations,

said body having formed in said lower marginal portions of the crushing face a third series of grooves extending parallel to one another and to the direction of travel of material being crushed,

the spacing between two adjacent grooves of said third series being substantially equal to the spacing between two indentations,

each groove of said third series extending from the lower edge of said face upwardly toward the cena rigid, rectangular, plate-like body of manganese or similar steel having a for-ward'crushing face to be mounted upright in a crushing mechanism With its back against a supportin surface on which it bears during crushing,

said crushing face being at least generally flattish,

said body having formed in the crushing face a first and second series of parallel grooves extending obliquely of the direction of travel of crushable material past said face,

the grooves small in comparison to the areas between the grooves,

said areas between said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said groove-s,

said pads serving to prevent lateral shift of material being crushed and tending to urge crushable material downwardly in such crushing mechanism while resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower edge of said face to leave at least a lower marginal portion free of said grooves,

said grooves at each margin forming a laterally extending generally sinuous or sawtooth shaped composite groove defining a series of apices alternating with indentions,

said body having formed in said lower marginal portions of the crushing face a third series of grooves extending parallel to one another and to the direction of travel of material being crushed,

the spacing between two adjacent grooves of said third series being substantially equal to the spacing be tween two indentations,

each groove of said third series extending from the lower edge of said face upwardly toward but short of the central areas of said face plate and being aligned at least generally with an indentation so that material does not feed from said apices directly into said third series of grooves to thereby avoid channeling of material into said third series of grooves,

said third series of grooves also permitting the movement under crushing blows of surface metal of the areas between the grooves of said third series to avoid the accumulation of bulging stresses in said lower marginal portion, the grooves of said third series being narrower than the groove-s of said first and second series.

3. A face plate for jaw crushers for crushing rocks and ore, comprising a rigid, rectangular, plate-like body of manganese or similar steel having a forward crushing face to be mounted upright in a crushing mechanism with its back against a supporting surface on which it bears during crushing,

said crushing face being at least generally fiattish,

said body having formed in the crushing face a first and second series of parallel grooves extending obliquely of the direction of travel of crushable material past said face,

the grooves being small in comparison to the areas between the groove-s,

said areas between said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said grooves,

said pads serving to preventla-teral shift of material being crushed and tending to urge crushable material downwardly in such crushing mechanism while resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower edge of said face to leave at least a lower marginal portion free of said grooves,

said grooves at each margin forming a lateral-1y extending generally sinuous or sawtooth shaped composite groove defining a series of apices alternating with indentations,

said body having formed in said lower marginal portions of the crushing face a third series of grooves extending parallel to one another and to the direction of travel of material being crushed,

the spacing between two adjacent grooves of said third series being substantially equal to the spacing between two indentations,

, each groove of said third series extending from the lower edge of said face upwardly toward the central areas of said faceplate,

the grooves of the third series being offset from the apices of theadjacent composite grooves so that material does not feed from said apices directly into said third series of grooves to thereby avoid channeling of material into said third series of grooves,

said third series of grooves also permitting the movement under crushing blows of surface metal of the areas between the grooves of said third series to avoid the accumulation of bulging stresses in said lower marginal portion.

4. A face plate for jaw crushers for crushing rocks and ore, comprising a rigid, rectangular, plate-like body of manganese or similar steel having a forward crushing face to be mounted upright in a crushing mechanism with its back against a supporting surface on which it bears during crushing,

said crushing face being at least generally flattish,

said body having formed in the crushing face a first and second series of parallel grooves extending obliquely of the direction of travel of crushable material past said face,

the grooves being small in comparison to the areas between the grooves,

said areas betwcen said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said grooves.

said pads serving to prevent lateral shift of material being crushed and tending to urge crushable material downwardly in such crushing mechanism while resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower edge of said face to leave at least a lower marginal portion free of said grooves,

said grooves at each margin forming a laterally extending generally sinuous or sawtooth shaped composite groove defining a series of apices alternating with indentations,

said body having formed in said lower marginal portions of the crushing face a third series of grooves extending parallel to one another and to the direction of travel of material being crushed,

the spacing between two adjacent grooves of said third series being substantially equal to the spacing between two indentation,

each groove of said third series extending from the lower edge of said face upwardly toward but short of the central areas of said faceplate,

the grooves of the third series being offset from the apices of the adjacent composite grooves so that material does not feed from said apices directly into said third series of grooves to thereby avoid channeling of material into said third series of grooves,

said third series of grooves also permitting the movement under crushing blows of surface metal of the areas between thegrooves of said third series to avoid the accumulation of bulging stresses in said lower marginal portion, the grooves of said third series being narrower than the grooves of said first and second series.

- 5. A faceplate for jaw crushers for crushing rocks and ore,

comprising a rigid, rectangular, plate-like body of manganese or similar steel having a forward crushing face to be mounted upright in a crushing mechanism with its back against a supporting surface on which it bears during crushing,

said crushing face being at least generally flattish,

said body having formed in the crushing face a first and second series of parallel grooves extending obliquely of the direction of travel of crushable material past said face,

the grooves being small in comparison to the areas between the grooves,

said areas between said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said grooves,

said pads serving to prevent lateral shift of material being crushed and tending to urge crushable material downwardly in such mechanism while resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower each groove of said third series extending from the,

lower edge of said face at least generally upwardly toward but short of the grooves of the first and second series,

the grooves of the third series forming interrupted continuations of the grooves of at least one of said first and second series.

6. A face plate for jaw crushers for crushing rocks and ore, comprising a rigid, rectangular, plate-like body of maganese or similar steel having a forward crushing face to be mounted upright in a crushing mechanism with its back against a supporting surface on which it bears during crushing,

said crushing face being at least generally flattish,

said body having formed in the crushing face a first and second series of parallel grooves extending obliquely of the direction of travel of crushable material past said face,

the grooves being small in comparison to the areas between the grooves,

said areas between said grooves lying at least generally in a common plane,

the grooves of the first series intersecting the grooves of the second series at abrupt angles and dividing the major portion of said crushing face into a network of grooves and diamond shaped crushing pads isolated from each other by said grooves,

said pads serving to prevent lateral shift of material being crushed and tending to urge crushable material downwardly in such crushing mechanism while resisting the tendency of the same to belch,

said grooves permitting the movement of surface metal of said pads under crushing blows to avoid the accumulation of bulging stresses in the pad portions of said faceplate,

said grooves terminating short of at least the lower edge of said face to leave at least a lower marginal portion free of said grooves,

said grooves at each margin forming a laterally extending generally sinuous or sawtooth shaped composite groove defining a series of apices alternating with indentations,

said body having formed in said lower marginal portions of the crushing face a third series of grooves extending at least generally vertically of said face,

the grooves of said third series being subtsantially equally spaced apart,

each groove of said third series extending from a lower margin of said face plate upwardly toward but short of the central area of said faceplate and short of the groove of the first and second series,

the grooves of said third series being of similar form and size,

the grooves of said third series being so located that at least a major portion of each groove lies in an area underlying an indented portion of the lower composite groove.

1,626,535 4/27 2,609,154 9/52 Baker 241-291 ANDREW R. JUHASZ, Primary Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,201,054 August 17, 1965 Ivan C. King ent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 9, for "of" read to line 40, for "crushed" read crusher column 2, line 8, for "fame" read frame column 3, line 19, for "povid'ed" read provided column 6, line 16, for "indentation" read indentations line 55, after "such" insert crushing column 8, line 13, for "subtsantially" read substantially Signed and sealed this 8th day of March 1966.

(SEAL) Atteat:

ERNEST W. SWIDER EDWARD J. BRENNER Attesting Officer Commissioner of Patents 

1. A FACE PLATE FOR JAW CRUSHERS FOR CRUSHING ROCKS AND ORE COMPRISING A RIGID, RECTANGULAR, PLATE-LIKE BODY OF MANGANESE OR SIMILAR STEEL HAVING A FORWARD CRUSHING FACE TO BE MOUNTED UPRIGHT IN A CRUSHING FACE TO BE BACK AGAINST A SUPPORTING SURFACE ON WHICH ITS BEARS DURING CRUSHING, SAID CRUSHING FACE AT LEAST GENERALLY FLATTISH, SAID BODY HAVING FORMED IN THE CRUSHING FACE A FIRST AND SECOND SERIES OF PARALLEL GROOVES EXTENDING OBLIQUELY OF THE DIRECTION OF TRAVEL OF CRUSHABLE MATERIAL PAST SAID FACE, THE GROOVES BEING SMALL IN COMPARISON TO THE AREAS BETWEEN THE GROOVES, SAID AREAS BETWEEN SAID GROOVES LYING AT LEAST GENERALLY IN A COMMON PLANE, THE GROOVES OF THE FIRST SERIES INTERSECTING THE GROOVES OF THE SECOND SERIES AT ABRUPT ANGLES AND DIVIDING THE MAJOR PORTION OF SAID CRUSHING FACE INTO A NETWORK OF GROOVES AND DIAMOND SHAPED CRUSHING PADS ISOLATED FROM EACH OTHER BY SAID GROOVES, SAID PADS SERVING TO PREVENT LATERAL SHIFT OF MATERIAL BEING CRUSHED AND TENDING TO URGE CRUSHABLE MATERIAL DOWNWARDLY IN SUCH CRUSHING MECHANISM WHILE RESISTING THE TENDENCY OF THE SAME TO BELCH, SAID GROOVES PERMITTING THE MOVEMENT OF SURFACE METAL OF SAID PADS UNDER CRUSHING BLOWS TO AVOID THE ACCUMULATION OF BULGING STRESSES IN THE PAD PORTIONS OF SAID FACEPLATE, SAID GROOVES TERMINATING SHORT OF AT LEAST THE LOWER EDGE OF SAID FACE TO LEAVE AT LEAST A LOWER MARGINAL PORTION FREE OF SAID GROOVES, SAID GROOVES AT EACH MARGIN FORMING A LATERALLY EXTENDING GENERALLY SINUOUS OR SAWTOOTH SHAPED COMPOSITE GROOVE DEFINING A SERIES OF APICES ALTERNATING WITH INDENTATIONS, SAID BODY HAVING FORMED IN SAID LOWER MARGINAL PORTIONS OF THE CRUSHING FACE A THIRD SERIES OF GROOVES EXTENDING PARALLEL TO ONE ANOTHER AND TO THE DIRECTION OF TRAVEL OF MATERIAL BEING CRUSHED, THE SPACED BETWEEN TWO ADJACENT GROOVES OF SAID THIRD SERIES SUBSTANTIALLY EQUAL TO THE SPACED BETWEEN TWO INDENTATIONS, EACH GROOVE OF SAID THIRD SERIES EXTENDING FROM THE LOWER EDGE OF SAID FACE UPWARDLY TOWARD THE CENTRAL AREAS OF SAID FACE PLATE AND BEING ALIGNED AT LEAST GENERALLY WITH AN INDENTATION SO THAT MATERIAL DOES NOT FEED FROM SAID APICES DIRECTLY INTO SAID THIRD SERIES OF GROOVES TO THEREBY AVOID CHANNELING OF MATERIAL INTO SAID THIRD SERIES OF GROOVES, SAID THIRD SERIES OF GROOVES ALSO PERMITTING THE MOVEMENT UNDER CRUSHING BLOWS OF SURFACE METAL OF THE AREAS BETWEEN THE GROOVES OF SAID THIRD SERIES TO AVOID THE ACCUMLATION OF BULGING STRESSES IN SAID LOWER MARGINAL PORTION. 